A very cool range estimator

[Joe schmoe]

Interesting, I have not been logging the data but basing this off of deciding if I have a high enough SOC before I leave.

I’ve been driving from the coast to Coachella Valley once or twice a month for several years in the car and range is pretty consistent all year long. It is the same route all year in different temperatures door to door. I am not seeing a 20% difference on the 90 degree days compared to the 45 or 50 degrees that you see.

Most of my driving is in Southern California and I’ve not driven in temperatures below 20 in this car but I personally do not see any significant difference in my Model S until I get below 35.

Same here.

My daily driver for 7 years has been a Model S 85D. I‘ve driven it mostly between mid 30s and 90s with temperature making little difference in that range.

Part of that may be that the car is usually parked in a partly heated garage and doesn’t cold soak unless I’m at work or traveling.

I’ve driven it in single digit temperatures (F) with higher consumption but much of that was also in snow.

Winds make a significant difference for highway travel, especially since I keep roof bars on the car year round. I will slow down in a headwind if necessary to make range. Even 5 mph can make a significant difference from a baseline usually at 79mph (speed limit +9 on the autopilot). I use aviation apps already on my phone to get surface winds from nearby airports, there’s probably a better way for the car.

The most significant range killer I worry about is heavy rain, which is common in the southeast and can -double- watt hours per mile.

edit: another factor for me seems to be tire pressure. I’m super ticky about keeping the tire pressures above 48 cold., it’s noticeable if they get lower.

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[Blueassassin]

I like the drag race part this is fun! also the rivian looses to a lot of cars in the 1/2 mile drag because its limited to the 120MPH

 

[Blueassassin]

https://motormatchup.com/simulation...f5&distance=0.25&starting_speed=0&surface=DRY

 

[kylealden]

It is the data from my car.

Data logging and analysis by teslafi.com

I have similar logs from my car but there are tons of confounding factors -

• When it's very cold, I'm much more likely to have a rooftop box loaded with skis, and lots of passengers.
• When it's very cold, I'm much more likely to be driving up and over mountain passes.
• When it's very cold, I'm much more likely to be driving in heavy snow, slush, and rain.

My experience has been that the range hit from cold alone is actually not too bad (in the ballpark of 10-15% depending on preconditioning and other factors), but the range hit from winter is pretty severe because that's when I ask the most of my vehicle. TeslaFi has no way to differentiate the two.

 

[roth_nj]

Im curios to see what the real cold temp hit is…. Especially because it was -10F for me this morning

 

[ajdelange]

Several posters have pointed out that it is not the cold itself that does most of the range degradation but rather the things that come with cold weather such as stronger winds, snow and rain (this really is a killer surprisingly enough) and excessive use of heat. Cold itself does have an effect as colder air is denser than warmer and thus drag is increased but the change in air density is not that big and drag is perhaps 1/3 of the load (if you are driving at sane speeds). To keep yourself from seeing 25% losses at near freezing temperatures do these things
A)Prewarm the cabin and battery on shore power before departing
B)Don't drive into headwinds or on snowy or wet roads if possible
C)Use the seat heaters instead of cabin heat. You'll be amazed at how comfortable you can be in a cabin well below 65°F. Blankets, especially the electric ones made especially for cars/trucks and especially if plugged into a supplemental supply (Jackery....) can be quite effective.
D)Check tire pressures (they drop in cold weather)
E)Make sure vehicle has had any adhering snow and/or ice removed.

 

[crashmtb]

Yiikes - With some additional weight and a head wind that range drops significantly. 122mi range with 300lb in the bed and 10mph head wind. I like to travel at 90mph on the highway - lol.

A colleague moved to GTA from Saskatoon, bought a C5 Corvette “to keep up with traffic” on the 400 series highways ?

 

[crashmtb]

Im curios to see what the real cold temp hit is…. Especially because it was -10F for me this morning

Last week it was -30 here

 

[stickyfingers]

A colleague moved to GTA from Saskatoon, bought a C5 Corvette “to keep up with traffic” on the 400 series highways ?

driving any less than 130km/hr is not possible in Toronto. But you can do 150km/hr In the right lane of the highway any time. Lol. Stooopid drivers in Toronto go right to the passing lane because they’ve been taught that’s the fast lane and since they are driving at 105km/h they are fast.

 

[MountainBikeDude]

Yiikes - With some additional weight and a head wind that range drops significantly. 122mi range with 300lb in the bed and 10mph head wind. I like to travel at 90mph on the highway - lol.

Slow poke!

 

[SANZC02]

It is the data from my car.

Data logging and analysis by teslafi.com

The website/app takes your Tesla username/password and pretends to be the official Tesla app, sucking up any and all information Tesla would normally send to the app. Unlike the official Tesla app though, it saves the data forever.

I wonder if that is the app in this hack?

 

[Scott]

Range hit in the cold seems to be much higher at lower speeds and on shorter trips for me. Which makes sense, if I am driving slow a higher percentage of overall power goes to warming up the battery and the passenger space. Same with short drives, a higher percentage of overall use is the heating overhead.

On my longer drives, at highway speeds, the hit from running the heater is a much smaller use of the power overall as I am spending way more energy per unit of time to move the car.
So winter range loss is going to be different based on driving habits. Do you park your car outisde overnight and then drive 2 miles at 25 mph (my wife’s commute)? Or do you have a heated garage and drive the car 30miles at 70 mph? The first situation will report way higher winter range loss than the later.

 

[SeaGeo]

Range hit in the cold seems to be much higher at lower speeds and on shorter trips for me. Which makes sense, if I am driving slow a higher percentage of overall power goes to warming up the battery and the passenger space. Same with short drives, a higher percentage of overall use is the heating overhead.

Yuuuuppp. Heating is primarily a function of time, not mileage. Around town my ID.4 efficiency has dropped by a massive amount (like from 3.4 down to 2.3 mi/kwh), but it's pretty minimal once things are warmed up. And that's not even below freezing.

 

[E.S.]

• When it's very cold, I'm much more likely to have a rooftop box loaded with skis, and lots of passengers.
• When it's very cold, I'm much more likely to be driving up and over mountain passes.
• When it's very cold, I'm much more likely to be driving in heavy snow, slush, and rain.

Wow! I must declare that your and my "when it's very cold" scenarios are very different -

* When it's very cold, I'm grabbing a pair of flamethrowers and keeping warm (I claim no responsibilities for neighbors' homes being burnt down)

 

[Rhidan]

When you adjust the temperature slider, I'm not sure its adding in energy loss for cabin heat. I think its just using air temperature to calculate air density. You might need to add Aux power to add the impact of cabin heat.

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